<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button onclick="console.log('点击事件触发')">点击事件</button>
    <button class="remove">解除</button>
    <script>
        document.querySelector('.remove').onclick = function(){
            document.querySelector('button').removeAttribute('onclick');   
        }
    </script>
</body>
</html>